Asbestos; Glass; Fused silica

Asbestos; Glass; Fused silica · Cooperative Patent Classification (CPC)

Chemical and metallurgical processes, compounds, and materials.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeC04B35/82
Official titleAsbestos; Glass; Fused silica
Display labelAsbestos; Glass; Fused silica
Total patents149

Filing trend

Year-over-year patent counts classified under this CPC code.

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
20159
201622
201711
20187
201916
202014
202120
202213
202311
202410
202515
20261

Representative patents

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.

Frequently asked questions

Answers are generated from the same data shown on this page.

What is CPC C04B35/82?
CPC C04B35/82 is the Cooperative Patent Classification code for “Asbestos; Glass; Fused silica.”
How many patents are filed under CPC C04B35/82 (Asbestos; Glass; Fused silica)?
Our database includes 149 publications tagged with this CPC code.
Is patent activity under CPC C04B35/82 growing?
Publication counts under this code: 10 in 2024 vs 15 in 2025 (latest complete years).